Quickly finding out if all three voices on the SID chip actually work is surprisingly difficult. I’ve spent a long time searching the net for a sensible solution with little luck. I’ve found some, but none I’m completely happy with. The one’s I’ve tried seen to blank the screen and not show what’s going on […]

C16/+4 8501 to 6510 CPU conversion I have made it possible to convert the unreliable 8501 processor fitted to the Commodore 16 and Plus 4 to the more reliable, cheaper and widely available 6510, as fitted to the Commodore 64. The conversion is very simple for the C16, just plug the small circuit board containing […]

This conversion should also work for the NTSC 6567 to 8562. The 6569/6567 and 8565/8562 are almost pin for pin compatible. The only difference being the 6569 has 12v on pin 13 and the 8565 has 5v on pin 13. ASSY No. 250407 To get rid of the 12v supply to pin 13, remove […]

The Plus 4’s power connector is a square version of the C64’s and is annoying. It’s more convenient to use a Vic 20 or C64 PSU as they are compatible and more readily available. Here’s how to make the necessary modification. First buy a PCB mountable 7 pin DIN connector and cut the two pins […]

Vic 20 Replace BASIC and Kernal ROM’s with 27128 EPROM I had a Vic 20 with a faulty BASIC ROM and thought it would be nice to combine the BASIC and Kernal ROM’s into one. This gives you the ability to modify the standard ROM’s. The conversion is pretty simple. The only issues are the two […]

I have a large collection of Commodore 64 software which has been in my loft since the 80’s. I assumed all the disks would be corrupt due to their age and temperature changes. Nevertheless I decided to buy a disk drive from eBay and try to back them up. To my surprise most the them […]

I have a large collection of Commodore 64 software which has been in my loft since the 80’s. I assumed all the disks would be corrupt due to their age and temperature changes. Nevertheless I decided to buy a disk drive from eBay and try to back them up. To my surprise most the them […]

I have a large collection of Commodore 64 software which has been in my loft since the 80’s. I assumed all the disks would be corrupt due to their age and temperature changes. Nevertheless I decided to buy a disk drive from eBay and try to back them up. To my surprise most the them […]

I have a large collection of Commodore 64 software which has been in my loft since the 80’s. I assumed all the disks would be corrupt due to their age and temperature changes. Nevertheless I decided to buy a disk drive from eBay and try to back them up. To my surprise most the them […]

I have a large collection of Commodore 64 software which has been in my loft since the 80’s. I assumed all the disks would be corrupt due to their age and temperature changes. Nevertheless I decided to buy a disk drive from eBay and try to back them up. To my surprise most the them […]